Updates to Sonar Bookends InDex. InDex Pro, InFnote, InSeq, and InXref are free to users who had previously purchased a version of the product after April 1, 2014. Otherwise, a one-year support agreement that includes updates is $125 for Sonar Bookends InDex, InFnote, InSeq, and InXref and $245 for Sonar Bookends InDex Pro. Support agreements can be purchased on the Virginia Systems' web site under "Ordering."

Virginia Systems was founded in 1984 and specializes in text retrieval, automatic index-generation, cross-referencing, PDF bookmark and hyperlink generation, and footnote software.